Bronwyn Barry, CPHD One Sky Homes Passive House California North American Passive House Network GREENBUILD 2016
Bronwyn Barry, CPHD One Sky Homes
Passive House California North American Passive House Network
GREENBUILD 2016
q CA homes use 31% less than the U.S. average
q Expenditure for energy about
the same as U.S. average
q 62M BTU energy use per home = 18,170 kWh
q Average size = 1,525 SF
q 60% Single Family Homes
Source: www.eia.gov/consumpion/residential
Energy use: 18,170 kWh/yr Ø Assume: 400 kWh/panel Ø 12 kW PV Array Ø = 45 panels!
Source: www.eia.gov/consumpion/residential
Min. Required Roof Area = 780 SF (Assuming 17.3 SF/panel)
PROJECT STATS
Co#le-CAClimateZone3
HDD/CDD 2335 574Area/TFA 3200SF 2776SFNetAnnualEnergyUse&ProducCon 9356kWh 11,100kWhPV 6.2kW
Gas/ElectricSplit
GasCooking,SolarHotWaterwithbackup
HVACsystems
HeatPump,NightBreezeCooling,SolarThermalHotWater,HRV
ASSEMBLIES (hr.ft2.F/BTU)
ROOF/CLG: R-38
T-24 REQ’D VS. AS-BUILT
R-50
WALLS: R-25 R-26
WINDOWS: U-0.38
FLOOR/SLAB: R-0 R-14
U-0.3
BEFORE
REVISIONS
1'-1
1"
23'-3 1/2"
9'-9
"
25'-1"
11'-8 1
/2"
6'-7" 33'-1"
10
'-4
"
13
'-4
"
46'-8"
4'-0"
22'-2 1/2"39'-2"
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Date
Scale
Drawn
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Sheet
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B. BARRY
1/4" = 1'-0"
408-4
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Str
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ura
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ax:
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CO
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AC
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Seze
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PROPOSED ELEVATIONS
Prelim WindowQuote 6.22.12
1/4" = 1'
FRONT - SOUTH EAST
SIDE - SOUTH WEST
SIDE - SOUTH EAST
REAR - SOUTH WEST
REVISIONS
1'-1
1"
23'-3 1/2"
9'-9
"
25'-1"
11'-8 1
/2"
6'-7" 33'-1"
10
'-4
"
13
'-4
"
46'-8"
4'-0"
22'-2 1/2"39'-2"
1019 V
alle
y F
org
e D
rive
Sunnyv
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, C
A 9
4087
04.06.2012
CO
NT
AC
T:
Alle
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nd
408-4
21-6
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PR
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CT
: N
ew
Hom
e @
Date
Scale
Drawn
Job
Sheet
Sheet D
esc
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nD
esi
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nd C
onstr
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y:
182
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B. BARRY
1/4" = 1'-0"
408-4
21-6
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Str
uct
ura
l Engin
eering b
y:
ON
E S
KY
HO
ME
S274 E
. H
am
ilton A
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te C
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pbell,
CA
95008
Vo
ice: 408-8
71-7
273 F
ax:
408-8
71-7
274
CO
NT
AC
T: B
rian M
oon, S
r. E
ngin
eer
Seze
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truct
ura
om
PROPOSED ELEVATIONS
Prelim WindowQuote 6.22.12
1/4" = 1'
FRONT - SOUTH EAST
SIDE - SOUTH WEST
SIDE - SOUTH EAST
REAR - SOUTH WEST
REVISIONS
1'-1
1"
23'-3 1/2"
9'-9
"
25'-1"
11'-8 1
/2"
6'-7" 33'-1"
10
'-4
"
13
'-4
"
46'-8"
4'-0"
22'-2 1/2"39'-2"
1019 V
alle
y F
org
e D
rive
Sunnyv
ale
, C
A 9
4087
04.06.2012
CO
NT
AC
T:
Alle
n G
illila
nd
408-4
21-6
808
PR
OJE
CT
: N
ew
Hom
e @
Date
Scale
Drawn
Job
Sheet
Sheet D
esc
riptio
nD
esi
gn a
nd C
onstr
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n b
y:
182
0 C
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Ave
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ZE
N S
TR
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B. BARRY
1/4" = 1'-0"
408-4
21-6
808
Str
uct
ura
l Engin
eering b
y:
ON
E S
KY
HO
ME
S274 E
. H
am
ilton A
ve., S
te C
, C
am
pbell,
CA
95008
Vo
ice: 408-8
71-7
273 F
ax:
408-8
71-7
274
CO
NT
AC
T: B
rian M
oon, S
r. E
ngin
eer
Seze
nS
truct
ura
om
PROPOSED ELEVATIONS
Prelim WindowQuote 6.22.12
1/4" = 1'
FRONT - SOUTH EAST
SIDE - SOUTH WEST
SIDE - SOUTH EAST
REAR - SOUTH WEST
REVISIONS
1'-1
1"
23'-3 1/2"
9'-9
"
25'-1"
11'-8 1
/2"
6'-7" 33'-1"
10
'-4
"
13
'-4
"
46'-8"
4'-0"
22'-2 1/2"39'-2"
1019 V
alle
y F
org
e D
rive
Sunnyv
ale
, C
A 9
4087
04.06.2012
CO
NT
AC
T:
Alle
n G
illila
nd
408-4
21-6
808
PR
OJE
CT
: N
ew
Hom
e @
Date
Scale
Drawn
Job
Sheet
Sheet D
esc
riptio
nD
esi
gn a
nd C
onstr
uctio
n b
y:
182
0 C
ottle
Ave
nue
, S
an J
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Hig
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ero
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y H
om
es
PR
OP
OS
ED
ELE
VA
TIO
NS
A4
CS
LB
# 8
226
52
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n@
onesk
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com
SE
ZE
N S
TR
UC
TU
RA
L E
NG
INE
ER
ING
B. BARRY
1/4" = 1'-0"
408-4
21-6
808
Str
uct
ura
l Engin
eering b
y:
ON
E S
KY
HO
ME
S274 E
. H
am
ilton A
ve., S
te C
, C
am
pbell,
CA
95008
Vo
ice: 408-8
71-7
273 F
ax:
408-8
71-7
274
CO
NT
AC
T: B
rian M
oon, S
r. E
ngin
eer
Seze
nS
truct
ura
om
PROPOSED ELEVATIONS
Prelim WindowQuote 6.22.12
1/4" = 1'
FRONT - SOUTH EAST
SIDE - SOUTH WEST
SIDE - SOUTH EAST
REAR - SOUTH WEST
AFTER COPYRIGHT ONE SKY HOMES 2013
PROJECT STATS
Sunnyvale-CAClimateZone3
HDD/CDD 2643 220Area/TFA 2000SF 1560SFNetAnnualEnergyUse&ProducCon 5,765kWh/yr none
Gas/ElectricSplitGasCooking,
DHW
HVACsystems
1tonFujitsuHP&
PanasonicBathFans,
HRV
ASSEMBLIES (hr.ft2.F/BTU)
ROOF/CLG: R-38
T-24 REQ’D VS. AS-BUILT
R-40
WALLS: R-25 R-26
WINDOWS: U-0.38
FLOOR/SLAB: R-0 R-24
U-0.3
Table 9: Annual Site and Source Energy Savings Normalize to TMY3 Source: http://www.nrel.gov/docs/fy15osti/63085.pdf
MEASURED SAVINGS: § $499 per year energy cost § 40% Source Energy
PROJECT STATS
Alamo-CAClimateZone12
HDD/CDD 2602 1578Area/TFA 3000SF 2342SFNetAnnualEnergyUse&ProducCon 8,400 kWh13,785 kWhPV 7.5kW Gas/ElectricSplit AllElectric
HVACsystemsHeatPump,
HRV
ASSEMBLIES (hr.ft2.F/BTU) ASSEMBLIES (hr.ft2.F/BTU)
ROOF/CLG: R-38
T-24 REQ’D VS. AS-BUILT
R-46
WALLS: R-19 R-28
WINDOWS: U-0.57
FLOOR/SLAB: R-0 R-14
U-0.3
3200 3000 1560 15250
2000400060008000100001200014000160001800020000
Co,le Alamo Sunnyvale Av.CA
EnergyUse&FloorArea
EnergyUse
FloorArea
2.92 2.803.70
11.91
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
Co.le Alamo Sunnyvale Av.CA
EUI(kWh/sf.yr)
0 1000 2000 3000 4000 5000
BERNSTEIN
MIGHTYHOUSE
CLARUMOFFICE
POESTREET
FIELD/CHIARELLO
STANFORDST
OXFORDST
TreatedFloorArea(>2)
Large
Average Size
Tiny
MIXED USE BLDG
SINGLE FAMILY HOME
COMMERCIAL OFFICE BLDG
SINGLE FAMILY HOME
SFH
SFH
0.00 5.00 10.0015.0020.0025.0030.0035.0040.0045.00
BERNSTEIN
MIGHTYHOUSE
CLARUMOFFICE
POESTREET
FIELD/CHIARELLO
STANFORDST
OXFORDST
Floor/Slab(hr.A2.F/BTU)
0.00 5.00 10.0015.0020.0025.0030.0035.0040.0045.00
BERNSTEIN
MIGHTYHOUSE
CLARUMOFFICE
POESTREET
FIELD/CHIARELLO
STANFORDST
OXFORDST
OverallWindow(hr.A2.F/BTU)
0.00 5.00 10.0015.0020.0025.0030.0035.0040.0045.00
BERNSTEIN
MIGHTYHOUSE
CLARUMOFFICE
POESTREET
FIELD/CHIARELLO
STANFORDST
OXFORDST
ExteriorWalls(hr.A2.F/BTU)
0.00 5.00 10.0015.0020.0025.0030.0035.0040.0045.00
BERNSTEIN
MIGHTYHOUSE
CLARUMOFFICE
POESTREET
FIELD/CHIARELLO
STANFORDST
OXFORDST
Roof(hr.A2.F/BTU)
Ø Assemblies were all very similar, despite large floor area variation
Ø All used simple forms and roof design Ø None have an attached garage
Passive House Design-related observations:
Passive House & ASHRAE Std 55 – Thermal Comfort
NONE of our clients have asked us to lower their energy bills. ALL have asked for better comfort or to eliminate mold.
COPYRIGHT ONE SKY HOMES 2013